Electrode material for solid-state batteries

By using lithium-magnesium alloy electrode materials, the problem of pressure sensitivity of pure lithium anodes stacked in solid-state batteries was solved, achieving high cycle stability and contact retention under low pressure, and reducing the risk of battery failure.

CN122249889APending Publication Date: 2026-06-19OXFORD UNIVERSITY INNOVATION LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
OXFORD UNIVERSITY INNOVATION LTD
Filing Date
2024-11-08
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Pure lithium metal anodes are difficult to meet performance requirements in solid-state batteries, especially under high stacking pressures, which can easily lead to current concentration, lithium filament formation, electrolyte rupture and short circuits, and are incompatible with end-user applications.

Method used

Electrode materials containing lithium and magnesium alloys are used, with a magnesium content of less than 5.0 at.%, to balance lithium-ion diffusion kinetics and interfacial contact retention, and reduce stacking pressure sensitivity.

Benefits of technology

It improves the cycle stability and performance reliability of the battery under low stacking pressure, reduces the risk of current concentration, and reduces the possibility of electrolyte rupture and short circuit.

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Abstract

An electrode material for use in solid-state batteries is described. This electrode material comprises an alloy containing lithium and magnesium, wherein the alloy has a total magnesium content of less than 5.0 at.%. The use of the electrode, the solid-state battery, the electrode material, or the electrode itself, as well as methods for producing the electrode material or the electrode, are also described.
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